<template>
  <div class="xtx-infinite-loading" ref="container">
    <div class="loading" v-if="loading">
      <span class="img"></span>
      <span class="text">正在加载...</span>
    </div>
    <div class="none" v-if="finished">
      <span class="img"></span>
      <span class="text">亲，没有更多了</span>
    </div>
  </div>
</template>
<script>
export default {
  props:{ 
    loading:{
      type:Boolean,
      default:false
    },
    finished:{
      type:Boolean,
      default:false
    }
  },
  mounted() {
    var obj =this.$refs.container
    const observer= new  IntersectionObserver(([{isIntersecting}])=>{
        if(isIntersecting){
          //到达可视区域停止观察
          // observer.unobserve(id)
          if(!this.loading&&!this.finished){
            this.$emit('getdata')
          }
        }
    },{})
    observer.observe(obj)
  },
}
</script>

<style scoped lang='scss'>
.xtx-infinite-loading {
  .loading {
    display: flex;
    align-items: center;
    justify-content: center;
    height: 200px;
    .img {
      width: 50px;
      height: 50px;
      background: url(../../assets/img/jiazai.gif) no-repeat center / contain;
    }
    .text {
      color: #999;
      font-size: 16px;
    }
  }
  .none {
    display: flex;
    align-items: center;
    justify-content: center;
    height: 200px;
    .img {
      width: 200px;
      height: 134px;
      background: url(../../assets/img/daodi.png) no-repeat center / contain;
    }
    .text {
      color: #999;
      font-size: 16px;
    }
  }
}
</style>